Boiler-furnace.



E. P. SELDEN & H. s.`PELL,1R.

BOILER FURNACE.

APPLICATION FILED MAY25.1915.

Patented Sept. 12, 1916.

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EDWARD P. SELDEN, 0F ERIE, AND HARRY S. PELL, JR., OF EAST MILLCREEK TOWN- SHIP, ERIE COUNTY, PENNSYLVANIA, ASSIGNORS T0 ERIE CITY WORKS COMPANY, 0F ERIE, PENNSYLVANIA, A CORPORATION OF PENNSYLVANIA. i

BOILER-FURNACE.

Specification of Letters Patent.

Patented Sept. 12, 1916.

Application filed May 25, 1915. Serial No. 30,422.

To all whom it may concern:

Be it known that we, EDWARD P. SELDEN and HARRY S. PELL7 Jr., citizens yof the United States, residing at Erie and in East Millcreek township, respectively, county of Erie, and State of Pennsylvania, have invented new and useful Improvements in Boiler-Furnaces, of which the following is a specification.

This invention relates to boiler furnaces and consists in certain improvements in the construction thereof as will be hereinafter fully described and pointed out in the claim.

The invention is particularly desirable in connection with portable steam boilers and the invention as shown is so arranged.

The invention is illustrated in the accompanying drawings as follows Figure-1 shows a vertical central section of the boiler and furnace. Fig. 2 a section on the line 2 2.

l marks the furnace, 2 the shell of the furnace, 3 the usual opening to the furnace, 4 the grate, a iange or bracket for supporting the lining and 6 the lining.

In providing a lining for a portable boiler difficulty is encountered in getting an etlicient lining and at the same time one that will stand shipment in place. The most desirable lining is a one piece lining formed practically to fit the shell. Such a lining keys and supports itself especially with the cylindrical shape but where a close fit is made with the shell especially if there is an insulating space of either air or a space filled with some insulating material and if there is a direct contact with the shell of the boiler and this contact is continued circumferentially the unequal expansion of the lining and the shell subjects the lining to strains which causes it to deteriorate. Ve obviate this difliculty by forming the lining in a complete annulus and preferably of one piece circumferentially and have this spaced from the boiler shell but preferably so that there is contact at points. The intermediate spaces between the points of contact form insulating spaces and also permit the boiler shell to go and come from and toward the insulating lining so as to take care of any variation in expansion or contraction between the shell and thev lining.

In the preferred constructions we form the lining of one piece having its outer surface corrugated with the crests 7 extending 55 vertically and these crestsl are in direct contact with the shell of the boiler thus forming points of support throughout the circumference ofthe lining and at the same time forming intermediate spaces 8 insulat- 60 ing the shell from the lining and permitting the shell between the points'of contact to go and come to take care of unequal expansion and contraction.

IVe prefer to form the boiler 9 in contin- 65 uation of the cylindrical shell 2 of the furnace. The freedom for expansion is particularly desirable withl this boiler, because any strain due to unequal expansion of the lining and shell is added to the boiler strain. Our construction removes any possibility of such a result.

The boiler is provided with the fiue sheets 11 and l2 and the vertical iiues 13.

The boiler and furnace preferably have a vertical axis as shown, as this simplifies the construction making it possible to make a complete portable boiler without stay bolts or braces.

What we claim as new is A boiler furnace having an annular metal shell; and a lining forming a complete annulus contacting with the shell at points throughout the circumference thereof spaced at points from the shell to permit variations 85 in expansion and contraction between the shell and the lining and to insulate the shell from the lining in combination with a boiler having a cylindrical shell formed in continuation of the furnace shell.

In testimony whereof we have hereunto set out hands in the presence of two subscribing witnesses.

EDWARD P. SELDEN. HARRY S. PELL, AJR.

l/Vitnesses:

THOMAS C. MILLER, B. M. HARTMAN.

Copies of this patent may be obtained for ve cents each, by addressing the Commissioner of Patents. Washington, D. C. 

